Improvement in platform weighing-scales



`improved scale.

UNTTED. STATES PATENT OFFICE.

RICHARD J. MCKEONE, OF INVERNESS, MICHIGAN.

IMPROVEMENT IN PLATFORM WEIGHING-SCALES.

Specification 'forming part of Letters Patent No. 110,261, dated December SO, 1870.

To all whom it may concern:

Be it known that I, Rio/HARD JnirEs Mc- VKEONE, of Inverness, in the county of Cheboygan and State of Michigan, have invented a new and Improved Scale; and I do hereby declare that the following is a full, clear, and eXact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in scales, and it consists in an improved arrangement of the suspending devices for the platform, calculated to simplify and cheapen the cost of the same, also, in an improvedarrangement of levers with fixed weights and pointers working over dials to indicate the weights, in substitution ofthe ordinary scale-beams and movable weights, as hereinafter described.

Figure l represents .a rear elevation of my Fig. 2 represents a front elevation partly sectioned; and Fig. 3 represents ahorizontal section.

Similar letters of reference indicate corresponding parts.

The suspendingbars A for the platform are hung by links B from studpins O, projecting from the inner walls ofthe base D. They are provided with vertical points E, rising from the inner ends of short arms F.

G represents longer arms, also connected to t-he bars A, and projecting toward the center line between the said bars, near which they are connected by links H to the lever I, supported at one end on thepoints K of the bars A, and connected at the other end to the bar L, suspended Vfrom the weighing-levers. All the bearings of these platform-suspending devices work on knife-edge supports in the usual way. The weight on the platform IWI, no matter where it is placed, will oscillate the bars A alike, and transfer thereby the strain to the lever I through the links H, and from the bar I it is imparted to the suspending-bar L in the usual way.

NN are the levers, with permanentweights O at the ends of the long arms, and 'from the short arms of which the bar L is suspended by the rings O and studs P P. These levers are suspended by their studs Q in links R, sus= pended on studs at S, projecting from curved arms T, rising` up at opposite sides of the vertical line of the bar L from the stand U.

IV is a disk supported centrally on a pro longation ofthe stud Q of one of the levers, N', and within a circular scale-rim, X, supported on a bar, Y, connected to the same stud, Q, and to the stud S of the arm T on the same side of the vertical line of the bar L with the lever to which it is connected. This disk IV carries two pointers, a, and b, for indicating the weight as they are carried around the scale by the turning ofthe studs Q, caused by the downward movement of the short arms of the levers when articles to be weighed are placed on the plaform. The disk \V and scale X are connected to the stud-pins Q and S so as to vibrate from the point S in unison with the vibration of the levers from the said points S on the links R. These links It and the rings O are introduced to prevent any sliding movements of any of the parts, which would otherwise be necessary in consequence of the vari ations constantly taking place in the distance horizontally between the studs P and P and between P and Q.. Moreover, these links have the effect to constantly change the line of draft between the studs P and P, asis required by the movements of the points P and the weights of the levers N around the center Q, to cause a given weight on the bar L or platform to have the same effect on the weighted arms-z'. c., to move them through the same distance, whether they are nearer to or farther from the vertical. line, so that the divisions of the scale may be uniform. The pointers can only move a quarter of a revolution, and in order tomake the disk IV and the scale-rim X as small as possible, and yet have the spaces on the scale as wide i as can be, I place two pointers on the disk at right angles to each other and extend the scale on the rim X to half the circumference, alternating the marks and quarters between the two numbers, placing the even numbers on one quarter for one pointer, and the odd numbers on the other quarter for the other pointer.

The disk V need not be used necessarily, the pointers only being placed on the stud of the lever.

In practice I propose to 'place pointers on Weighted levers N N', links It, and rings O, thc fulcrnin-stnds of each lever, and arrange substantially as specified. therewith the necessary scale-rim.

Having thus described my invention, I claim si gned by me this 20th day of September, 1869. as new and desire to secure by Letters Patentt l C r i1 T 4. l. The arrangement of the bars A, short L T Nr KLOAE arms F, points E, long` arms G, and lever I, Vitfnesscs:

all substantially as specified. GEo. IV. MA'EEE,

2. The combination, with the bar L, ofthe l ALEX F. RonEn'rs.

The abovcspeoication of iny invention 

